Shipping rack



FIG. 1 is a front perspective view of the shipping rack showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The dash-dot lines show environment which form no part of the claimed design. 

CLAIM The ornamental design for a shipping rack, as shown and described. 